EG 201 147-1997 Equipment Engineering (EE); Interworking between Direct Current/Isolated (DC/C) and Direct Current/Common (DC/C) Electrical Power Systems (V1.1.1)
1998EG 201 147-1998 Equipment Engineering (EE); Interworking between Direct Current/Isolated (DC/I) and Direct Current/Common (DC/C) Electrical Power Systems (V1.1.2)
1997EG 201 147-1997 Equipment Engineering (EE); Interworking between Direct Current/Isolated (DC/C) and Direct Current/Common (DC/C) Electrical Power Systems (V1.1.1)